package com.house.api.interceptor;

import com.house.common.context.BaseContext;
import com.house.common.exception.HouseException;
import com.house.common.properties.JwtProperties;
import com.house.common.result.HttpCodeEnum;
import com.house.util.JwtClaimsConstant;
import com.house.util.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * jwt令牌校验拦截器
 */
@Component
@Slf4j
public class JwtTokenUserInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }
        // 从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getUserTokenName());
        if (token == null || token.length() == 0) {
            throw new HouseException(HttpCodeEnum.NOT_LOGIN);
        }
        // 校验令牌
        try {

            log.info("jwt校验令牌:{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);
            String userId = claims.get(JwtClaimsConstant.USER_ID).toString();
            BaseContext.setCurrentId(userId);
            log.info("当前员工id：", userId);
            // 通过放行
            return true;
        } catch (Exception e) {
            // 不通过，响应401状态码
            response.setStatus(401);
            return false;
        }

    }
}
